Stump-burning apparatus



G.F.KENT CH; STUMP BU RNIN G APPARATUS. APPLICATION FILED MAR. 5. 1920.'

' Patented ar. 7; 1922.

y mfu hn PATENT OFFICE.

GEORGE E. KENTCH, OF OLATSKANIE, OREGON.

STUMP-BURNIN G APPARATUS.

App1ication filed March 5, 1920. Serial No.

To (4Z5 whom cit-may concern:

Be it known that I, GEORGE F. KENTCH, a citizen of the United States, and residentof Clatskanie, county of Columbia, State of Oregon, have invented a new anduseful Improvement in Stump-Burning Apparatus, of which the following is a specification.

My invention relates to devices used in burning up stumps of logged over land.

The clearing of stump land is a problem of great magnitude, and numerous attempts have been made to devise ways and means by which stumps can be destroyed quickly and economically in order to leave the ground in condition for agricultural development.

The object of my invention is to a furnace, preferably mounted on a truck so that it may be conveniently moved about, and specifically adapted to be used in burning up stumps by directing against them a blast of burning fuel.

I accomplish this object by means of the device shown and explained in the accompanying drawings which form a part of this specification. In these drawings:

Fig. 1 is a perspective view of my device showing it in its relative position with respect to a stump about to be burned up;

'Fig. 2 is a perspective view showing a portion of the frame work of a truck on which my device is adapted to be carried;

Fig. 3 is a longitudinal vertical section of my device, showing it mounted on the truck;

Fig. vice;

Fig. 5 is a vertical section on the line 55 of Fig. 8;

Fig. 6 is a fragmentary rear end elevation of the device showing the damper arrangement; and

Fig. 7 is a view showing a detail of construction of the truck.

In these drawings, a represents like oven in. which a fire is built, and the flame of this fire is used as the direct agent for promoting the combustion of the wood of the stump 5.

My apparatus comprises av box like body a constituting a furnace. This furnace is preferably divided by a longitudinal partition 9 into two chambers c and cl. The front end of the body is provided with a tapering extension 0 divided by the partition 9 into pro vide 4. is a horizontal sectionof my dea torch Specification of Letters Patent.

Patented Mar. 7, 1922. 363,535.

walls each :provided with dampers as h and z". The interiors of the chambers c and d are divided by perforated walls, or screens, 7' and 7:: so as to permit the gaseous and semi gaseous products of combustion and combustible material to pass into the nozzles c and f.

A cover Z on the top of each of the furnace chambers provides a means for placing fuel in the chambers or for'cleaning them out. Coiled pipes m and n are located in the chambers c and d respectively. The rear ends of these coils are adapted to connect with a source of compressed air through the hose m, and the forward ends of the coils extend into the open months so as to be in proper position for creating a blast through said months.

0 represents suitable truck wheels journalled on an axle 7). A longitudinal sill g fastened on said axle, supports a frame 7 made of I-beams. A pair of angle iron guides s are fastened on the bottom of the oven and are adapted to hold the latter against transverse movement on the frame 1,

yet at the same time permit a relative longitudinal movement of these parts.

Clips t fastened to the bottomv of the body have toes t (see Figure 7 which are adapted to bear against the bottom of the sill q and thus prevent tilting of the body off the truck, though permitting the body to be moved longitudinally on the truck.

The general operation of my device is as follows:

Both furnace chambers of the oven are filled with wood, and a fire is started in one. As this fire burns, a coking action will set up in the other furnace chambers, so that when the first fire is burned out, the coke made in the other chamber may be ignited and used as fuel while the first mentioned chamber is refilled and used as a coking oven.

' In this way, one chamber of the furnace will always be in use as a fire-box while the other will be in use as a coking oven.

hen the fire in the ignited chamber has sufiiciently developed, the compressed air is turned on. The mouth of the oven is then directed toward the stump to be burned, and the powerful blast flame thrown against the stump will speedily and completely burn I stroy the stumpage chamber from said coiled 111 such chamber having an inlet prothe stump up. p

By moving my apparatus as the burmng progresses, the flame maybe directed so as to follow the roots far under the ground and completely destroy them.

My device can also be adapted for burning'down brush as it is pushed forward through the same, and will also destroy completely the roots of the same. My de vicein fact is in the principle of a torch that can be directed against and completely deand brush upon uncleared land, and do the Work that otherwise arequired the labor of many men. s

I claim:

.1. An apparatus of the character described comprising a'box like body constituting a furnace chamber, a cover for the latter, a

damper provided in the rear wall of the chamber, the front of thebody having a tapering extension beyond the furnace chamber, such extension constituting a nozzle, a

perforated wall. separating the furnace extension, an air-pipe jecting beyond the rear Wall of the furnace chamber and an outlet end projecting beyond said perforated Wall into said nozzle ,extension, the rear end of said air-pipe being adapted to be coupled to a source of air under pressure. 7

. 2. r The combination set forth in claim 1 including a truck supporting said body by means permitting the latter longitudinal movement on the truck. 7

8. An apparatus of the character described comprising a box like body divided by a longitudinal partition into two furnace chambers, a removable cover for each furnace chamber, a damper provided in the rear wall of each chamber, the front of the body having a tapering including a truck supporting said body by means permlttlng the latter longitudinal movement on the truck.

GEORGE xnnrcn. I

extension beyond 7 the furnace chambers, such extension pro-V 4-. The combination set forth in claim 3 

